修复前端节点在线情况

internal/handler/user_api.go

@@ -213,7 +213,51 @@ func UserServerFetch(c *gin.Context) {
 		Fail(c, 500, "failed to fetch servers")
 		return
 	}
-	Success(c, servers)
+
+	// Fetch all servers for parent lookup
+	var allServers []model.Server
+	if err := database.DB.Find(&allServers).Error; err != nil {
+		Fail(c, 500, "failed to fetch all servers")
+		return
+	}
+	serverMap := make(map[int]model.Server, len(allServers))
+	for _, s := range allServers {
+		serverMap[s.ID] = s
+	}
+
+	now := time.Now().Unix()
+	result := make([]gin.H, 0, len(servers))
+	for _, server := range servers {
+		lastCheckAt, _ := database.CacheGetJSON[int64](nodeLastCheckKey(&server))
+		isOnline := 0
+		if lastCheckAt > 0 && now-lastCheckAt <= 300 {
+			isOnline = 1
+		}
+
+		// Inherit online status from parent if current is offline
+		if isOnline == 0 && server.ParentID != nil {
+			if parent, ok := serverMap[*server.ParentID]; ok {
+				pLastCheckAt, _ := database.CacheGetJSON[int64](nodeLastCheckKey(&parent))
+				if pLastCheckAt > 0 && now-pLastCheckAt <= 300 {
+					isOnline = 1
+					lastCheckAt = pLastCheckAt
+				}
+			}
+		}
+
+		result = append(result, gin.H{
+			"id":            server.ID,
+			"type":          server.Type,
+			"name":          server.Name,
+			"rate":          server.Rate,
+			"tags":          server.Tags,
+			"is_online":     isOnline,
+			"last_check_at": lastCheckAt,
+			"cache_key":     fmt.Sprintf("%s_%d_%d", server.Type, server.ID, server.UpdatedAt.Unix()),
+		})
+	}
+
+	Success(c, result)
 }
 
 func currentUser(c *gin.Context) (*model.User, bool) {